English Racing 4G63 Underdrive Oil Pump Gear
This Underdrive Oil Pump Gear has a larger overall diameter to lower the very high oil pressures these engines reach and allows more oil to be in the pan where it should be to protect the engine.
Fits All 4G63 & 4G64 Blocks for DSM & Evo 1 - 9
Must have balance shaft delete
Oil pump front cover requires light modification - can be done in car
Gear Retards Cam timing about 2 deg please Adjust Accordingly
Q- Timing belt?
A- Same as stock. Just reset the idler on the tensioner. requires minor trimming of the pump and cover to fit. Not big deal for the engines these are made for!
Q- How much does it drop oil pressure?
A- 1100 rpm idle is 20 psi, the pump doesn't exceed 90 psi even with rolled bearings (deleted shaft). Cars that have a balance shaft delete but retain the shaft will be in the 80psi range which fits the old 10psi per 1000rpm rule even better.
A- Reduced load on the oil pump which means reduced failures of both pump and engine.
For CA Proposition 65 Warning: Click Here
|Type of Part||Engine|